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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 GanbJ72d5CbcUapm3tBkvrs9diCvup/7Fkwt3CFKbTwCuqN6pTWLHglsWKGAXSrI
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<SEC-DOCUMENT>0001404511-07-000005.txt : 20070625
<SEC-HEADER>0001404511-07-000005.hdr.sgml : 20070625
<ACCEPTANCE-DATETIME>20070625174229
ACCESSION NUMBER:		0001404511-07-000005
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20070614
FILED AS OF DATE:		20070625
DATE AS OF CHANGE:		20070625

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MASSMUTUAL PARTICIPATION INVESTORS
		CENTRAL INDEX KEY:			0000831655
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				043025730
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1500 MAIN STREET
		STREET 2:		SUITE 600
		CITY:			SPRINGFIELD
		STATE:			MA
		ZIP:			01115
		BUSINESS PHONE:		4132261000

	MAIL ADDRESS:	
		STREET 1:		1500 MAIN STREET
		STREET 2:		SUITE 600
		CITY:			SPRINGFIELD
		STATE:			MA
		ZIP:			01115

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MASSMUTUAL CORPORATE INVESTORS II
		DATE OF NAME CHANGE:	19880417

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Ross Michael
		CENTRAL INDEX KEY:			0001404511

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-05531
		FILM NUMBER:		07939688

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		413-226-1036

	MAIL ADDRESS:	
		STREET 1:		MASSMUTUAL
		STREET 2:		1500 MAIN STREET    PO BOX 15189
		CITY:			SPRINGFIELD
		STATE:			MA
		ZIP:			01115
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>ros35.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2007-06-14</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000831655</issuerCik>
        <issuerName>MASSMUTUAL PARTICIPATION INVESTORS</issuerName>
        <issuerTradingSymbol>MPV</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001404511</rptOwnerCik>
            <rptOwnerName>Ross Michael</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>BABSON CAPITAL MANAGEMENT</rptOwnerStreet1>
            <rptOwnerStreet2>1500 MAIN STREET    PO BOX 15189</rptOwnerStreet2>
            <rptOwnerCity>SPRINGFIELD</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01115</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Officer of the Adviser</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Ross, Michael</signatureName>
        <signatureDate>2007-06-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>mrosspipowerofattorney.txt
<TEXT>

SEC Form 3, Form 4 and Form 5 - Confirmation of Authority to Sign

Pursuant to Instruction 7 to SEC "Form 3 - Initial Statement of
Beneficial Ownership of Securities", "Form 4--Statement of Changes
in Beneficial Ownership" and "Form 5 - Annual Statement of
Beneficial Ownership of Securities", the undersigned, being a Vice
President of MassMutual Participation Investors (the "Issuer") and
a Managing Director of Babson Capital Management LLC, investment
adviser to the Issuer, hereby appoints and designates until the
earlier of their removal, resignation, or death, Sara Stinson,
Mark Godin, Melissa Busso, Ruth Howe, and Ann Malloy, each as my
true and lawful attorneys in fact with full power to sign for me
and file with the Securities and Exchange Commission, the
New York Stock Exchange, and the Issuer said SEC Forms 3, 4
and/or 5 with respect my relationship with the Issuer and any
shares of the Issuer purchased or sold by the undersigned and
any other change of beneficial ownership relating to equity
or derivative securities of the Issuer required to be reported
by the undersigned.

This authorization shall remain in effect until a written
revocation is executed by the undersigned and filed with
the Securities and Exchange Commission.


Signature and Date:     Michael Ross            June 21, 2007
               ----------------------------------------------------------------

Name:             Michael Ross
Title:            Member of the Board of Managers of
                  Babson Capital Management LLC

















</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
